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19)In a one-way ANOVA, which of the following is true: a) the degrees of freedom have to be calculated b) the critical value can be found in the ANOVA table c) the Ho states that the means of populations of interest are equal d) a, b, c, are true e) None of these are true f) only a and c are true 20)Which of the following is an assumption for the "one-way analysis of variance experimental design"? a) all populations are normally distributed b) the populations have equal variances C) the observations are independent d) a, b, c, are true e) None of these are true f) only a and care true 19)In a one-way ANOVA, which of the following is true: a) the degrees of freedom have to be calculated b) the critical value can be found in the ANOVA table c) the Ho states that the means of populations of interest are equal d) a, b, c, are true e) None of these are true f) only a and c are true 20)Which of the following is an assumption for the "one-way analysis of variance experimental design"? a) all populations are normally distributed b) the populations have equal variances C) the observations are independent d) a, b, c, are true e) None of these are true f) only a and care true